Comment 15 for bug 1933027

Update: a workaround to recover the "gdm user chooser" is to avoid the smartcard support from launching, which can be done editing this file

/etc/xdg/autostart/org.gnome.SettingsDaemon.Smartcard.desktop

comment out the existing "Exec" line, and add a new one pointing to this harmless do-nothing binary, /usr/bin/true

The chooser now works. Still wondering how is it that 22.04 was working with no problem with my yubikey always plugged since June till November